public class hw1 {
    public static void main(String[] args) {
        int [] arr = {1,2,3,4,5,6};
        transform(arr);
        for (int x:arr) {
            System.out.print(x+" ");
        }
    }
    public static void transform (int [] arr){
        for (int i = 0; i <arr.length ; i++) {
            arr[i] *= 2;
        }
    }
}

